Ways to change the image background

1) Easiest Method - Online using PhotoScissors

Step 1: Select the photo you want to edit

Open PhotoScissors online and click the Upload button then select an image file on your local PC. The program opens the image and displays it in the browser:

The left part of the screen is for editing, while the right part displays the final result.

Step 2: Select the background and the foreground

Now, we need to tell PhotoScissors, where the background is. Normally, you would have to tinker with various selection tools, but in PhotoScissors the process is easier. Click the green marker tool on the toolbar and mark objects that are on the foreground. Then select the red marker tool and mark background objects the same way.

Simple, right? Green is for objects that should stay, red is for background you want to change. Note that as you mark the image with green and red tools, the preview at the right side reflects changes you make. By default, PhotoScissors applies transparent background to the picture:

Make small adjustments to green and red zones if necessary. Remember, you don't have to paint the entire background with red, a few rough strokes is enough.

Step 3: Change the background

Now, to replace background of the photo, switch to the Background tab in the right menu.

On the Background tab, select "Image" in the dropdown, then click the "Select Image" button and select what image you would like to use as a new background.

Nice! This background looks much better. And that didn't take too long. Finally, save the photo with the replaced background by clicking the Save button on the toolbar.

2)  Using Paint

Follow link: 

https://www.wikihow.com/Change-an-Image-Background-in-MS-Paint-(Green-Screen)

3) Using Photoshop

Follow link: 

https://blog.hubspot.com/marketing/how-to-remove-background-image-in-powerpoint-design-ht